Gage for crosscut-saws.



Patented Sept. I8, I900.

.1; Mom. GAGE FOB GROSSG'UT SAWS.

(Application filed Sept. 18, 1899.)

(No Moder.)

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UNITED STATES PATENT OFFICE.

JOSEPH MORIN, OF SEATTLE, \VASI-IINGTON.

GAGE FOR CROSSCUT-SAWS.

SPECIFICATION forming part of Letters Patent N0. 658,274, datedSeptember 18, 1900. Application filed September 18, 1899- Serial No.730.96 (N0 mode -3 To all whom t't may concern:

Be it known that I, JOSEPH MORIN, a citizen of the United States, and aresident of Seattle, in the county of King and State of Washington, haveinvented certain new and useful Improvements in Gages for Orosscut-Saws, of which the following is a specification.

My invention relates to improvements in gages to enable the operator tomore easily and accurately gage and test the raker-teeth ofcrosscut-saws and joint the cutting-teeth of the same and is animprovement on my Patent No. 540,329, dated June 4:, 1895; and

the objects of my improvement are, first, to,

provide a device in connection with sawgages for gaging and testing theraker or chisel teeth of crosscut-saws in swaging the same; second, toprovide a device in connection with a saw-gage for holding a chilledmetal plate having a slot large enough to admit a raker-tooth solid andimmovable with reference to the body of the gage and at a certaindistance below the points of the cutting-teeth, so that the points ofeach rakertooth may be made exactly the same length; third, to provide adevice for holding a file solid and immovable with its face at anaccurate right angle with the blade of the saw for jointing thecutting-teeth;' fourth, to provide a smooth frictionless surface in aperfect plane to rest on the cutting-teeth when gaging raker-teeth forswaging, and also to have a transverse section of this plane accuratelyat right angles with the saw-blade when swaging. I attain these objectsby, the tool described in the accompanying drawings, in which- Figure 1(A) represents a side elevation shown in position on saw S S for testingrakerteeth in swaging; Fig. 2, (A,) the opposite side elevation,reversed, in position on S S for jointing or filing points ofraker-teeth; Fig. 3, an end view showing on one side ribs traveling onside of saw-blade S in jointing rakerteeth and showing on opposite side,reversed, ribs traveling on side of saw-blade S in swaging; and Fig. 4is a detail plan View of the chilled plate used when filing raker-teeth.

Similar letters refer to similar parts throughout the several views.

The main part of my gage is made of a light cast frame, with openingsthrough the body to reduce theweight and for other purposes, as shown inFig. 1, letter A. On one side (shown in Fig. 1) at the top is a flangeor traveling cap D"D, faced with glass D D, cemented to metal flange,anend view of the same being shown in Fig. 3, thus providing a trueplane surface or straight edge on inner side of glass perfectly smooth,enabling the gage to slide backward and forward over points ofcutting-teeth without friction and being removed to give room for thisscrew.

The side of screw next to plate is on a line wit-h the outer edges ofparallel ribs, and end of screw is about flat and at right anglestherewith. .In swaging. the raker-teeth by turning this screw theoperator can fix the lower end at any desired distance below thestraight edge or under su rface of the glass.

Threaded onto the upper end of screw (1 d is a knurled thumb-nut'd,which is screwed down tight against top of flange D to prevent screw 01dfrom beingaccidentally moved. Midway from the top to the bottom and onthe bottom edge of main plate,on side shown in Fig. 1, are two slightparallel ribs-E E e 3, much narrower than flange D, also shown in Fig.3, the outer edges of which are ground to a perfect right angle with thesurface of the glass straight edge which prevent the cutting-teeth afterhaving been set from engaging the'side of the main plate and travel onthe side of the saw as the gage is moved along in swaging. The middleportion of each of these ribs is removed to make the gage lighter. Onopposite side of main plate when gage is reversed, as shown in Fig. 2,and on the top edge is a flange B B, interrupted midway between ends byan opening under which is fastened a chilled plate B, as describedbelow. On the lower edge and halfway between it and upper flange areparallel ribs C O and D D, much narrower than flange B B and extendingpart way along the plate O to strengthen it, the outer edges making aperfect right angle with the under surface of .flange B B and travelingon side of saw when jointing cutting-teeth or filing all of them to samelength. Attached to the under side of flange B, covering the openingmentioned, as shown in detail in Fig. 2 and end view in Fig. 3, is thechilled plate 13, (shown in Fig. 4,) held solidly and firmly at its endsto flange B by two screwsb 19, passing through slots made to fit headsof screws b b. The top of this chilled plate is on a true parallel planewith the inner side of flange B B one-fiftieth of an inch lower, (moreor less, as desired by operator,) the chilled plate at its ends beingseparated from flange by two pieces of sheet metal b 6 also shown in endview, Fig. 3. The sheet metal is used in order to drop the top ofchilled plate 8' slightly below the inner surface of flangeB B on a trueparallel line and so that when fastened with the screws 1) l) to flangeB it is perfectly solid, so that it cannot move out of this parallelplane or one end become higher than the other and deceive the operator.Through this chilled plate is a slot 1) for the insertion of theraker-teeth, (shown by dotted lines, Fig. 2,) which are jointed or fileddown till the file rests on the chilled plate, and this plate, fixed asabove, makes the points of each raker-tooth exactly the same length, thepoints of raker-tooth exactly the same distance below the points of thecutting-tooth, and each chisel or top edge of raker a right angle withsaw-blade. This plate is made of chilled metal to prevent the filecutting it when used on raker-tooth. At the corners on the under side ofchilled plate B, as shown in Fig. 2, are four little lugs or rises 19 11also shown in Fig. 1. Middle rib C, Fig. 2, has a thickened portion inits middle. (Shown in Fig. 3.) Through this thickened part of the rib athreaded screw is run, so that when a file is placed against the fourlugs by turning this screw the file is clamped solid against the fourlugs, the width between the inside ones and, ones farthest from mainplate being sufficient to make a firm clamp. The plane passing throughthe points of these lugs being at a perfect right angle with the outeredges of parallel ribs 0 O D D when file is fastened against these lugsand cuttingteeth jointed it makes a perfect jointer. File is shown inthis position in Fig. 1, H H.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. A gage for crosscut-saws consisting of a plate or frame having alateral flange on one edge, said flange being formed with an opening orcut-away portion intermediate of its ends and an aperture at each sideof and close to said opening, a plate formed with a slot for theraking-teeth of the saw, said plate being of a length greater than theopening or cut-away portion of the flange whereby its ends will beoverlapped by the ends of the flange bordering on said opening, andhaving slots in such overlapped ends adapted to register with theapertures in the flange, and fastening devices passing through said endslots into the apertures, as set forth.

2. In a gage for crosscut-saws, the combination with the body of thegage having a flange on one edge and longitudinal ribs on its side, anda clamping screw for a file mounted on the side of the said body, of aplate adapted for attachment to the under side of said flange andformed, on that side which is adjacent to the c1amping-screw,with lugswhose points are in a plane at right angles to the side edges of saidribs, as set forth.

3. In a gage for crosscut-saws, the combi nation with the body of thegage formed with an edge flange and side ribs, of a screw working insaid flange between the ends thereof and adapted to extend below thesurface of the same, that side of the screw next to the gage-body beingon a line with the outer edges of said ribs, and a locking-nut on saidscrew, substantially as set forth.

4. In a crosscut-saw gage the combination with the body of the gageconsisting of a flat plate having a flange or traveling cap on one edge,two longitudinal ribs, one at the opposite edge and the other in themiddle, of a glass plate or straight edge cemented to the under surfaceof the flange forming a perfoot plane, said plane being at right angleswith a plane passing through the outer edges of the parallel ribs, and agage-screw working in said flange, substantially as shown and described.

5. In a crosscut-saw gage, the combination with the body of the gageprovided with a traveling cap or flange on one edge, said flange beingformed with an opening intermediate of its ends, of a glass platecemented to the under surface of said flange, said plate having acut-out portion registering with the opening in the flange, and agage-screw working in said flange, as and for the purpose set forth.

6. In a gage for crosscut-saws, the combination with the body of thegage formed with a flange on one edge having an opening intermediate itsends and an aperture at each side of said opening, a chilled platehaving a slot for the raking-teeth of the saw and end slots adapted toregister with the apertures in the flange, screws fitted in said slotsand working in said apertures, and a metallic strip interposed betweenthe flange and each end of the plate close to the screws as and for thepurpose set forth.

JOSEPH MORIN. Witnesses:

FRANK ELLSWORTH KNOWLES, JOSEPH M. GLASGOW.

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